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using System.Collections.Generic;
using QuizGame.ViewModels;

namespace QuizGame.Models
{
    /// <summary>
    /// A quiz question that is displayed in the game host UI and sent to players.
    /// </summary>
    public class Question : ViewModelBase
    {
        private string _text; 
        /// <summary>
        /// The question text.
        /// </summary>
        public string Text
        {
            get => _text;
            set => SetProperty(ref _text, value); 
        }

        /// <summary>
        /// List of available answers.
        /// </summary>
        public List<Option> Options { get; set; }

        /// <summary>
        /// The index of the correct answer in Options.
        /// </summary>
        public int CorrectAnswerIndex { get; set; }
    }

    public class Option : ViewModelBase
    {
        public string Text { get; set; }
        public bool IsCorrectAnswer { get; set; }

        public bool _isLocalPlayerSelection;
        // Updated when the local player selects this option. 
        public bool IsLocalPlayerSelection
        {
            get => _isLocalPlayerSelection;
            set
            {
                if (SetProperty(ref _isLocalPlayerSelection, value))
                {
                    OnPropertyChanged(nameof(IsIncorrectSelectionIndicatorVisible));
                }
            }
        }

        public bool IsIncorrectSelectionIndicatorVisible => !IsCorrectAnswer && IsLocalPlayerSelection;

        public double Opacity => IsCorrectAnswer ? 1.0 : 0.4;
    }
}
